721073590090 has 64 divisors (see below), whose sum is σ = 1537609236480. Its totient is φ = 238249005120.

The previous prime is 721073590079. The next prime is 721073590109. The reversal of 721073590090 is 90095370127.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176542 + ... + 1213801.

It is an arithmetic number, because the mean of its divisors is an integer number (24025144320).

Almost surely, 2^721073590090 is an apocalyptic number.

721073590090 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

721073590090 is an abundant number, since it is smaller than the sum of its proper divisors (816535646390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

721073590090 is a wasteful number, since it uses less digits than its factorization.

721073590090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390627.

The product of its (nonzero) digits is 119070, while the sum is 43.

The spelling of 721073590090 in words is "seven hundred twenty-one billion, seventy-three million, five hundred ninety thousand, ninety".